My Favorite Sunrise Alarm Clock Now Tracks Your Sleep – No Wearable Required

Hatch has released a new sleep tracker called the Sleep Clock ($249) that promises to improve your sleep habits without requiring any wearable devices. For health-conscious parents already mindful of EMF exposure in their homes, this product raises important questions about the technology it uses and whether "contactless" really means EMF-free.

How the Sleep Clock Actually Works

Unlike traditional sleep trackers that use smart rings, watches, or wristbands, the Hatch Sleep Clock sits on your nightstand and uses "ultra-low-power radio signals" to detect breathing and movement throughout the night. The company positions this as a privacy-friendly alternative to cameras or microphones, but for families concerned about electromagnetic field exposure, the term "radio signals" deserves closer attention.

Radio signals are, by definition, a form of EMF radiation. While Hatch describes them as "ultra-low-power," the source article doesn't provide specific information about frequency ranges, power levels, or SAR (specific absorption rate) values. This is similar to the considerations we explore when evaluating low-EMF air purifiers or other bedroom electronics—the devil is in the details that manufacturers don't always disclose.

What This Means for EMF-Conscious Families

The Sleep Clock's approach differs from devices that emit continuous WiFi or Bluetooth signals, but "ultra-low-power" is a marketing term, not a standardized measurement. For comparison, even devices marketed as low-emission still produce measurable fields, much like the trade-offs we see with low-EMF hair dryers versus conventional models.

If you're already taking steps to reduce bedroom EMF exposure—turning off WiFi at night, keeping phones away from the bed, or considering options like EMF shielding paint—adding a device that actively emits radio signals throughout the night may contradict those efforts. The fact that it's contactless doesn't mean it's emission-free; it simply means the emissions are traveling through the air rather than being worn on your body.

For families prioritizing EMF reduction, a simpler sunrise alarm clock without tracking features may better align with creating a low-EMF sleep environment.

Originally reported by CNET